Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

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Homework Help Guidelines for Students and Helpers

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Sep 23, 2014

Replies: 2

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Hey! I posted in homework help but now it's gone!

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May 10, 2014

Replies: 0

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Homework Help: Introductory Physics Formulary

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Mar 17, 2012

Replies: 6

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The velocity of a movable block that is penetrated by an arrow

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47 minutes ago

Replies: 15

Views: 57

Find the total power developed in the circuit given the readout

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Today, 2:02 PM

Replies: 12

Views: 52

Tension in a pulley system pulled at an angle

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Today, 1:58 PM

Replies: 3

Views: 29

V-t graph problem

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Today, 1:34 PM

Replies: 9

Views: 63

Magnetization of ferromagnetic material

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Today, 11:53 AM

Replies: 4

Views: 84

Thermal Physics Problem -- Dropping a hot mass of iron into 20C water

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Today, 10:48 AM

Replies: 4

Views: 40

Integration of velocity to get distance/displacement

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Today, 9:51 AM

Replies: 1

Views: 23

Lorentz Transformation - Relative speeds to different observers

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Today, 8:08 AM

Replies: 2

Views: 25

Lorentz Transformations

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Today, 7:03 AM

Replies: 24

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Find second object's velocity in relativity

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Today, 1:08 AM

Replies: 2

Views: 35

Conservation of Momentum problem — Firing a cannonball

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Today, 12:28 AM

Replies: 9

Views: 116

Measuring particle mass in eV

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Yesterday, 4:46 PM

Replies: 7

Views: 75

Special relativity and Lorentz Transformation Exercise

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Yesterday, 11:49 AM

Replies: 35

Views: 240

Displacement of particle

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Yesterday, 5:45 AM

Replies: 6

Views: 86

A balloon and a stone

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Thursday, 9:13 AM

Replies: 43

Views: 364

Confusion about whether to use the specific heat of water or ice

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Thursday, 6:11 AM

Replies: 4

Views: 56

How does the presence of a dielectric change the max V of a capacitor?

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Thursday, 4:21 AM

Replies: 6

Views: 55

A rolling ball, find distance traveled

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Wednesday, 10:29 PM

Replies: 4

Views: 87

Mean energy density of solar radiation and magnitude of Poynting vector

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Wednesday, 12:37 PM

Replies: 1

Views: 99

Average Separation between molecules in hydrogen at STP (Alonso Finn Problem)

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Wednesday, 7:56 AM

Replies: 15

Views: 197

To find the possible angles of two leaning planks supporting a third plank via friction

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Tuesday, 5:00 PM

Replies: 6

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Comparing hydrostatic forces at the bottom of these 3 containers

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Tuesday, 1:36 PM

Replies: 22

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Natural angular frequency

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Tuesday, 10:54 AM

Replies: 5

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How to use Kirchhoff's voltage law on this circuit?

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Tuesday, 8:50 AM

Replies: 16

Views: 112

Is this a possible solution to Verma's Exercise 12, Chapter 5? (A rope and two pulleys lifting a weight)

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Tuesday, 6:40 AM

Replies: 4

Views: 47

Calculating the force required to push a steel rod up 50 cm into a water filled steel tank

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Tuesday, 3:51 AM

Replies: 24

Views: 255

Finding acceleration from position formula

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Monday, 9:42 PM

Replies: 4

Views: 127

Magnetic working point

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Monday, 5:22 PM

Replies: 2

Views: 98

Finding the coefficients of a Resistance vs. Temp curve

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Monday, 11:33 AM

Replies: 3

Views: 43

Solenoid pendulum frequency

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Monday, 11:01 AM

Replies: 7

Views: 138

Morin's mechanics problem 2.3 (motionless chain)

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Monday, 4:26 AM

Replies: 2

Views: 121

Halliday Resnick Krane Chapter 2 Problem 30: Juggling Five Balls

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Monday, 2:22 AM

Replies: 3

Views: 51

Maximize Range of Projectile Launched from Cliff

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Sunday, 7:13 PM

Replies: 17

Views: 230

Show that ##\int \frac{d\vec{a}}{d} = \frac{4}{3}\pi \vec{r}##

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Jan 15, 2022

Replies: 21

Views: 200

Intensity Distribution of Superposition of 2 Waves

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Jan 15, 2022

Replies: 5

Views: 110

Kepler's Third Law vs Conservation of angular momentum

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Jan 15, 2022

Replies: 8

Views: 109

Potential due to a finite charged wire

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Jan 14, 2022

Replies: 4

Views: 73

Standing Waves in a tube closed at both ends

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Jan 13, 2022

Replies: 5

Views: 95

Newton's law question involving force and acceleration

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Jan 13, 2022

Replies: 4

Views: 133

Maximum charge on a spherical capacitor

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Jan 13, 2022

Replies: 4

Views: 60

Weight of gold chain when dropped on a weighing scale

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Jan 13, 2022

Replies: 12

Views: 145

Find tangential velocity given radius and the coefficient of friction

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Jan 12, 2022

Replies: 3

Views: 90

Light incident on a sphere, focused at a distance ##2R##

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Jan 12, 2022

Replies: 2

Views: 64

Mass, acceleration and velocity

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Jan 12, 2022

Replies: 3

Views: 84

SOS please help -- Questions about mass, acceleration and velocity

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Jan 12, 2022

Replies: 4

Views: 142

Torque and forces (Beginner level)

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Jan 12, 2022

Replies: 14

Views: 141

Torque exerted on rolling cylinder

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Jan 12, 2022

Replies: 6

Views: 121

Rigid body dynamics problem, general motion analysis applied to human forearm drinking beer

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Jan 12, 2022

Replies: 24

Views: 253

Prove vectors are orthogonal

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Jan 11, 2022

Replies: 4

Views: 89

Circular Motion Problem -- Ball on a String Spinning in a Vertical Circle

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Jan 11, 2022

Replies: 2

Views: 101

Bohr radius of Earth-Sun system

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Jan 11, 2022

Replies: 5

Views: 131

Forces that act on a physical pendulum

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Jan 10, 2022

Replies: 7

Views: 94

Physics numerical solve

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Jan 10, 2022

Replies: 1

Views: 78

Distance moved in two different inertial frames

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Jan 10, 2022

Replies: 11

Views: 130

Shift in position of plank when a man moves on it (Centre of mass)

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Jan 10, 2022

Replies: 11

Views: 120

Mass of satellite

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Jan 9, 2022

Replies: 16

Views: 156

Trouble understanding total mechanical energy and the second law of Newton

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Jan 9, 2022

Replies: 2

Views: 87

Finding the frequency of a string based on Mass and Tension

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Jan 8, 2022

Replies: 1

Views: 101

Problem of spring block system: force vs conservation of energy

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Jan 8, 2022

Replies: 20

Views: 243

Intensity of a laser beam at a certain distance

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Jan 8, 2022

Replies: 13

Views: 90

Help in solving an electricity circuit problem involving Kirchoff's law

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Jan 7, 2022

Replies: 7

Views: 128

Trouble understanding the influence of a real spring in a system

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Jan 6, 2022

Replies: 3

Views: 138

Activity of Nuclide B

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Jan 6, 2022

Replies: 5

Views: 114

Kinematic Equations in Projectile Motion (this approach is not working)

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Jan 6, 2022

Replies: 16

Views: 167

Coulomb's force - magnitude of the electric force

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Jan 6, 2022

Replies: 11

Views: 1K

Potential difference between two points in an electric field

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Jan 6, 2022

Replies: 1

Views: 79

Calculating the velocity of a head-on impact between two suns

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Jan 6, 2022

Replies: 6

Views: 115

Simple Question: Deriving V = dW/dq for a circuit

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Jan 6, 2022

Replies: 7

Views: 190

Pendulum (weight on a string) released at an angle and the string hits a peg...

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Jan 5, 2022

Replies: 3

Views: 96

Question on sound intensity and dB

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Jan 5, 2022

Replies: 8

Views: 110

Relationship between E and V in space

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Jan 5, 2022

Replies: 27

Views: 371

Distance between rocket and object

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Jan 5, 2022

Replies: 30

Views: 265

Roundtrip by Plane

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Jan 5, 2022

Replies: 26

Views: 260

Fringing of electric field

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Jan 4, 2022

Replies: 6

Views: 96

How does metal sphere determine the potential of the plane by symmetry?

Last Post
Jan 3, 2022

Replies: 15

Views: 242

Single Loop Potential difference -- sign issue

Last Post
Jan 3, 2022

Replies: 8

Views: 80

Find the unit vectors perpendicular to the given vectors

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Jan 3, 2022

Replies: 20

Views: 177

Perfectly inelastic collision of two moving and rotating disks

Last Post
Jan 1, 2022

Replies: 9

Views: 140

Question on Resolving Power of Diffraction Grating

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Jan 1, 2022

Replies: 3

Views: 132

A bullet collides perfectly elastically with one end of a rod

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Jan 1, 2022

Replies: 21

Views: 174

Work done by friction

Last Post
Jan 1, 2022

Replies: 7

Views: 159

How to prove that a force is conservative?

Last Post
Jan 1, 2022

Replies: 40

Views: 475

"Doubling up" effect when pulling a chain on a table

Last Post
Dec 30, 2021

Replies: 11

Views: 171

Compton Effect, angle of deflection

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Dec 29, 2021

Replies: 1

Views: 4K

A.C. power supply voltage amplitude questions

Last Post
Dec 29, 2021

Replies: 6

Views: 120

Effect of temperature on vibrational frequency of a violin string

Last Post
Dec 29, 2021

Replies: 5

Views: 115

Recognizing Thermodynamic Scenarious (Work Done)

Last Post
Dec 28, 2021

Replies: 5

Views: 126

Disk and Stick Collision

Last Post
Dec 28, 2021

Replies: 2

Views: 107

Simple question about Lenz' Law

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Dec 27, 2021

Replies: 1

Views: 92

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Contradiction in Entropy

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Dec 27, 2021

Replies: –

Views: –

Rocket motion in space

Last Post
Dec 27, 2021

Replies: 1

Views: 99

Glancing Elastic Collision Questionnaire

Last Post
Dec 26, 2021

Replies: 6

Views: 125

What does 'dv and dx' mean in f = eta X A (dv/dx)?

Last Post
Dec 26, 2021

Replies: 6

Views: 4K

Modeling a kongming lantern (sky lantern)

Last Post
Dec 25, 2021

Replies: 6

Views: 188

Glancing elastic collision, and center of mass

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Dec 25, 2021

Replies: 17

Views: 2K

Determine the velocity of a particle in mass spectrometry

Last Post
Dec 25, 2021

Replies: 3

Views: 86

Self Study - Foundations of Electromagnetic Theory Problem 2-1 (two charged particles hanging on strings)

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Dec 25, 2021

Replies: 43

Views: 451

Force Diagram of Shelf

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Dec 25, 2021

Replies: 7

Views: 211

Angular momentum of the particle about point P as a function of time

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Dec 25, 2021

Replies: 13

Views: 192

Rolling without slipping down an inclined plane

Last Post
Dec 24, 2021

Replies: 18

Views: 396

Intro Physics Homework Help

Get introductory physics homework help, step by step from mentors. We do not give answers but guide you to it with your effort.

This is for algebra and calculus based general physics homework. Usually this is high school and undergraduate level problems.

Please use the template when asking for help, include all information and provide a reasonable attempt at a solution.

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